A320 One Brake Released landing performance
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A320 One Brake Released landing performance
Hi,
I just had a flight with a MEL item of one main wheel brake inop and in-flight landing performance calculation in the QRH has two different delta Vref for flaps 3 and flaps Full landing. For Flaps 3, delta Vref is 6 and for Flaps Full, delta Vref is 0.
What I don’t understand is why Flaps 3 need a higher delta Vref or why is there a need for delta Vref for Flaps 3 at all, given the overall braking efficiency is less. Can anybody shed some light on this?
Thank you,
Subria
I just had a flight with a MEL item of one main wheel brake inop and in-flight landing performance calculation in the QRH has two different delta Vref for flaps 3 and flaps Full landing. For Flaps 3, delta Vref is 6 and for Flaps Full, delta Vref is 0.
What I don’t understand is why Flaps 3 need a higher delta Vref or why is there a need for delta Vref for Flaps 3 at all, given the overall braking efficiency is less. Can anybody shed some light on this?
Thank you,
Subria
Last edited by subria023; 8th Apr 2022 at 06:11.
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Hello,
VREF is always equal to VLS config Full. With one brake inop, there is no change on your VAPP. The Delta vref + 6 you have in the QRH is the extra knots you need to fly in conf 3 regardless of the failure (VLS conf 3).
VREF is always equal to VLS config Full. With one brake inop, there is no change on your VAPP. The Delta vref + 6 you have in the QRH is the extra knots you need to fly in conf 3 regardless of the failure (VLS conf 3).
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